Best Time to Fly MCI to MDW: On-Time Stats by Hour & Airline
Kansas City International → Chicago Midway International
Data through July 2026 · Last updated October 18, 2026
Over the last 12 months, 80.2% of Kansas City (MCI) to Chicago (MDW) flights arrived on time (2,107 scheduled flights). That is 2.6 points above the national average of 77.6%.
Southwest Airlines was the only reporting airline with regular flights on this route.
Over 24 months, Wednesday was the most reliable day (88% on time) and July the worst month (77%).
The cancellation rate was 1.1% (US average 1.8%).
MCI to MDW on-time performance by airline
Last 12 months. Airlines with fewer than 30 completed flights are marked “limited data”.
| Airline | On time | Avg delay when late | Cancelled | Flights |
|---|---|---|---|---|
| Southwest Airlines | 80.2% | 50 min | 1.1% | 2,107 |
80%+ good 70–79.9% fair <70% poor
Best time of day to fly MCI to MDW
On-time arrival % by scheduled departure hour (local time), 4,262 flights over 24 months.
Show the numbers
| Departure hour | On time | Cancelled | Flights |
|---|---|---|---|
| 5am–6am | 93.7% | 0.9% | 434 |
| 6am–7am | 93.8% | 3.2% | 185 |
| 7am–8am | 88.9% | 0.7% | 281 |
| 8am–9am | 89.3% | 0.9% | 217 |
| 9am–10am | 93.1% | 2.3% | 133 |
| 10am–11am | 89.4% | 0.9% | 458 |
| 11am–12pm | 88.2% | 0.9% | 214 |
| 12pm–1pm | 87.8% | 1.7% | 175 |
| 1pm–2pm | 88.5% | 0.8% | 236 |
| 2pm–3pm | 79.2% | 0.8% | 257 |
| 3pm–4pm | 78.1% | 0.5% | 373 |
| 4pm–5pm | 67.8% | 1.5% | 260 |
| 5pm–6pm | 72.8% | 1.5% | 261 |
| 6pm–7pm | 74.9% | 1.9% | 268 |
| 7pm–8pm | 67.2% | 1.2% | 253 |
| 8pm–9pm | 82.6% | 1.5% | 134 |
| 9pm–10pm | 70.6% | 1.0% | 103 |
| 10pm–11pm | Limited data | 20 | |
Best day of the week
24 months, by day of departure.
Best month to fly
24 months, by calendar month.
Holiday travel on MCI to MDW
On-time arrivals during holiday periods compared with all other days, last 24 months.
| Period | On time | vs other days | Cancelled | Flights |
|---|---|---|---|---|
| Thanksgiving week (Tue before to Mon after) | 81.8% | -2.5 pts | 4.3% | 70 |
| Christmas & New Year (Dec 20 - Jan 3) | 82.6% | -1.7 pts | 0.0% | 155 |
| Summer peak (Jun 15 - Aug 15) | 77.7% | -6.6 pts | 1.3% | 818 |
| All other days | 84.3% | — | 1.1% | 3,219 |
Monthly on-time trend
On-time arrival % each month, with the 12-month US average for reference.
What causes delays on this route
Share of reported delay minutes, last 12 months (BTS cause categories).